Door-bolt



(No Model.) 2 Sheets-Sheet 1. E. 0. LADD.

DOOR BOLT.

No. 341,489. Patented May 11, 1886.

FIE- laz Figz WITNEEIEEE (No Model.) 2 Sheets-Sheet 2.

E. 0. LADD.

110011 BOL T No. 341,489. Patented Ma 11, 1886.

\A/ITNEEEIEE UNITED STATES PATENT OFFICE.

EDVARD O. LADD, OF EVERETT, MASSACHUSETTS.

DOOR-BOLT.

SPECIFICATION forming part of Letters Patent No. 341,489, dated May 11, 1886,

(No model.)

To all whom it may concern.-

Be it known that I, EDWARD O. LADD, of Everett, in the county of Middlesex and State of Massachusetts, a citizen of the United States, have invented a new and useful Improvement in Door-Latches, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part of this specification, in explaining its nature.

The object of the invention is to provide a latch of peculiar construction, which can be used for a bolt,and also additionally as a means for preventing the opening of the door more than a limited distance.

Referring to the drawings, Figure 1 shows in elevation a section of a door and doorframe with my improvement in place and representing the door as bolted. Fig. 2 is a horizontal section of the same through the bolt, the door bolted. Fig. 3 represents the same parts, the door being partly opened and held by the bolt; and Figs. 4, 5, 6, and 7 are detail views, hereinafter referred to.

A represents the door; A, the door-frame. B is the bolt. It is shaped in plan as shown in Fig. 1, and it comprises the long bar a, having the cross piece or head a, shaped to provide the shoulders a and the knob or thumb-piece a". It is fastened to the boltplate 0 by means of the holder 0, through which it passes, and in whichit is free to slide, and which is pivoted to the bolt-plate by the lugs or ears 0, which extend through the slots 0 formed in the plate 0 and the pin 0. The bolt-pl ate is adapted to be fastened to the door by means of the screws c,passing through the holes 0, and it has a catch, 0, which receives and holds the inner end of the arm of the bolt when it is used in fastening the door. This catch and the knob also act as stops in limiting the horizontal movement of the bolt when thus used. The holder 0 is loosely hinged or attached to the plate 0, so that the bolt may be swung vertically into and out of the catch. The other member of the locking device comprises a socket, D, which is fastened to the door-frame by suitable screws, and which comprises a flat plate, (Z, upon which is mounted a curved metal piece, cl, which is fastened to the plate in any desirable way, and which has the opening d upon the front side thereof of a size sufficient to receive the head a of the bolt. Extending outward from this opening is a recess, d, of a width sufficient to receive the portion of the bolt-bar beyond the shoulders 66', so that when the bolt-head has been inserted within the socket, upon the opening of the door the bolt-bar can swing into the recess (1, while the bolt is restrained from leaving it i that the bolt'head may turn in the socket with- 70 out binding. The edges a of the bolt-head should be wedge shaped or beveled, so that the end, of the head should be the narrowest part, as by so shaping the head a slight disarrangement of the fixture or sagging of the door will not interfere with the proper operation of the device, the end of the head being considerably shorter than the length of the opening d in the socket, andaffordingan easy entrance while the inclined edges serve to centrally 1ocate the head while it is being moved in.

In operation, to lock the door in the ordinary manner the bolt is simply slid in its holder to move its head through the opening (1 If, however, it is desired to open the door a limited distance and then secure it, the boltbar is lifted from the catch and the door moved. This movement of the door causes the bolt to swing upon its head and its holder to be moved outward until it comes in contact with the knob a. The position of the parts when the door is thus opened is well shown in Fig. 3. The inward movement of the bolt is limited by the stops 0 in the holder 0 and the shoulders a of the head a.

Having thus fullydescribed my invention, I claim and desire to secure by Letters Patent of the United States 1. A bolt supported by the hinged holder or holding-block c, and having the head a, provided with the shoulders a and the socket having the recesses d (1 all substantially as described.

2. The combination of the bolt-supporting ICO plate, the bolt-holder pivoted thereto to swing as described, the bolt supported by the said holder and provided with a sliding movement therein, and the bolt-head receiving socket or keeper D, all substantially as described.

3. The combination of the bolt-plate having the slots 0 the bolt-holder having the ears 0, the pin 0, and the sliding bolt B, supported by the holder, and having the head a, provided with the shoulders a with the bolt-head-rcceiving socket or keeper D, all substantially as described.

4. The combination of the bolt-plate O, the swinging bolt-supporting holder 0, the bolt B, the catch 0, and the knob a, all substantially as described.

EDVARD O. LADD.

Witnesses:

F. F. RAYMQND, 2d, FRED. B. DOLAN. 

